Method of attaching rubber to metals.



UNITJiiD STATES iigrEN'r OFFICE.

LEO, DAFT, or RUTHERFORD, NEW JERSEY, assroivon T ELECTED-CHEMICALRUBBER & MANUFACTURING COMPANY, A conr'omrron or may JERSEY.

METHOD or ATTACI-IING' RUBB R To mE'raLs.

Specification of Letters Iatent. Patented Mar. 25, 1913.

diluted to form an electrolyte, in the pro- 1 rality of metals two ofwhich are arsenic No Drawing. Application filed February 17, 1912.Serial No. 678,362. I

-To all whom it may concern: portion of 40 parts of the liquid to 60parts Be it'known that I, LEO DAFT, a subject of water, which producestl1e electrolyte at of the King of Great Britain, and a resident aspecific gravity of about 1.040. The article of Rutherford, in thecounty of Bergen, to be plated is then immersed in the elec- I 5 Stateof New Jersey, have invented a new trolyte and is plated inanyordinary'man- 60 and Improved Method of Attaching Rubber ner. Iprefer to use a current of about .6 to Metals, of which the followingisa speciof an ampere for each square deciinetre of fication. surface-tobe covered,-at a voltage offrom In my pending application; Serial No. 3%to 6 volts. These values, however, are

10 678,361, filed concurrently with this, I have not absolute and may bevaried within cer- 65 I set forth a method of causing rubber to adtainlimits, as will be obvious to any 'one here to metals, provided saidrubber conskilled in the art. The anode I prefer to tains'an excess ofsulfur over that required use with this electrolyte is an alloy of toproduce vulcanization. I have, however, copper, zinc and arsenic ,in-thefollowing described in said application a method of proportions: Copper64 parts, zinc 35 parts, 7 producing an electrolyte for electroplatingarsenic 1 part. This alloy I prefer to make a surface upon the articleto which the by first thoroughly fusing together the rubber is to beattached in theevent that copper and zincin [the proper proportions,said article does not contain the proper conand then adding the arsenicthereto in a stituents necessary to eifect the chemical pulverized form,and thoroughly puddling 75 union between the rubber and themetal; thewhole before pouring. The article thus It is to thismethotl ofelectroplating asurcoated is then cleaned to remove all foreign facewith an alloy containing arsenic when substances. The rubber is thenapplied to combined with the method referred to that it under pressureand is heated to a vulthis application is more particularly dicanizingtemperature, say about 286 degrees 80 rected. it under pressure and isheated to a 'vul- Inasmuch as the alloy which is to be canizer, and findthat heating for about 40 plated upon the article to which the rubberminutes at a pressure of 40 pounds above is to be attached shouldcontain its metal atmosphere, is usually sufiicient to produceconstituents in certain definite proportions, vulcanization of therubber, and to cause (which, however, may be varied according adhesionof the metal thereto. to the composition of the rubber compound) While.I have set forth above a method of and inasmuch as it is highlydesirable to practising my invention which gives good obtain a depositcontaining these metals in .results in practice, Ido not intend toconthese proportions with certainty, it is very fine myself to thisparticular method or to important to so proceed; in themaking of theparticularuingredients andproportions the electrolyte that none of itsconstituent I have set forth, as there are other equiva elements shallbe precipitated out of solulent -methods of practising my invention,tion, except to the extent of the excess over and doubtless still otherequivalent methods Q the particular quantity desired. To obtain to bediscovered by those skilled in the art. 95 these results I prefer toproceed as follows What I claim and desire to secure by Let: in themaking of the electrolyte: Iv first ters Patent, is: thoroughly fusetogether copper and zinc 1.,The method of attaching rubber to in theproportions of 65 arts of copper and metals which consists inelectroplating the 35 parts of zinc. This alloy I then dissolve articleto which .it is desired to attach the 100 in a strong oxidizing agent,preferably hot rubber in an electrolyte made from a plunitric acid(specific gravity 42 Baume) I rality of metals one of which is arsenic,obthen neutralize the solution with ammonia taining a deposit containingarsenic and ator other alkali, and add thereto a sufiicient taching therubber to the surface thus quantity of finely pulverized arsenictriformed, by vulcanization. i 105 oxid, sa about one er cent. Thisproduces '2. The method of attaching rubber to a dark lue, turbid iquid,which I clearby metals which consists in electroplating the addingotassium cyanid; the result being article to which it is desired toattach the a clear ight yellow liquid. This liquid is rubber in anelectrolyte made from a plu- 11 o and copper, obtaining a depositcontaining arsenic and copper, and attaching the rubber to the surfacethus formed, by vulcanization. 3. The method metals which consists inelectroplating the article to which it is desired to attach the rubberin an electrolyte made from a plurality-of metals, three of which arearsenic, copper and zinc, obtaining a deposit con-- n in Letters PatentNo. 1,057,333;

: specification requiring correction as follows:

a the words and syllable'Falwenhet't. I prefer Correct taining arsenic,copper and zinc and attaching the rubber 'to the surface thus formed, byvulcanization.

In witness whereof I have hereunto signed my name in the presence of twowitnesses.

. LEO DAFT;

of attaching rubber to Witnesses:

WALTER S. JONES, MARGARET MAGINTYRE.

It is hereby certified that in Letters Patent No. 1 ,057 ,333, grantedMarch 25, 1913,

; upon the appiication' of Leo Daft, of Rutherford, NewJersey, for animprovement in Methods of Attaching Rubberto Metals, an error appearsinthe prinELd Page 1 ,strike out line 81 and insert a W New. 0261-, andthat the said Letters Patents should be read with this correctiontherein that the same may conform to the record of the case in thePatent Oflice. i

- Signed and sealed this 15th day of- Apri1,';A. 1)., 1913.. p p

[SEAL.] 'c. 0. BILLINGS,

Acting Commissioner of Patents.

and copper, obtaining a deposit containing arsenic and copper, andattaching the rubber to the surface thus formed, by vulcanization. 3.The method metals which consists in electroplating the article to whichit is desired to attach the rubber in an electrolyte made from aplurality-of metals, three of which are arsenic, copper and zinc,obtaining a deposit con-- n in Letters Patent No. 1,057,333;

: specification requiring correction as follows:

a the words and syllable'Falwenhet't. I prefer Correct taining arsenic,copper and zinc and attaching the rubber 'to the surface thus formed, byvulcanization.

In witness whereof I have hereunto signed my name in the presence of twowitnesses.

. LEO DAFT;

of attaching rubber to Witnesses:

WALTER S. JONES, MARGARET MAGINTYRE.

It is hereby certified that in Letters Patent No. 1 ,057 ,333, grantedMarch 25, 1913,

; upon the appiication' of Leo Daft, of Rutherford, NewJersey, for animprovement in Methods of Attaching Rubberto Metals, an error appearsinthe prinELd Page 1 ,strike out line 81 and insert a W New. 0261-, andthat the said Letters Patents should be read with this correctiontherein that the same may conform to the record of the case in thePatent Oflice. i

- Signed and sealed this 15th day of- Apri1,';A. 1)., 1913.. p p

[SEAL.] 'c. 0. BILLINGS,

Acting Commissioner of Patents.

